aret = {}
# The box back goes behind the lightning bolt.
canvas = xybolt(boxback(size), computer(size), size, boltoffx=-2, boltoffy=+1, aux=aret)
aret = {}
# The box back goes behind the lightning bolt.
canvas = xybolt(boxback(size), computer(size), size, boltoffx=-2, boltoffy=+1, aux=aret)